7.8103.9 Crossover Due to Missing Check Valve in Recirculation of Hot Water Return

Topic: 
Water Heating
Subtopic: 
Maintenance/Inspection
Desired Outcome: 
Minimize energy and water waste to the lowest possible life cycle cost
TitleSpecification(s)Objective(s)
7.8103.9a
Hazardous material removal

Health concerns in the removal and replacement of equipment (e.g., asbestos, other hazardous materials) will be identified

Written notification will be provided to occupants of the discovery of hazardous material, including contact information for regional EPA EPA U.S. Environmental Protection Agency, www.epa.gov asbestos coordinator

Occupant will be asked to contract with an EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified asbestos contractor to conduct abatement before decommissioning and replacement (occupant is responsible for abatement or remediation)

Remediate health hazards using EPA EPA U.S. Environmental Protection Agency, www.epa.gov -certified contractors
7.8103.9b
Installation

Spring-loaded check valve will be installed on the hot water return of a recirculation loop immediately upstream of the storage tank

System will be purged

Valves will be added to the recirculation line to purge the system if needed

Work will be completed in an aesthetically pleasing manner (e.g., repairs made to structure and finished surfaces)

Eliminate crossover
7.8103.9c
Commissioning

Water pressure downstream of the check valve will be verified

Ensure proper operation